Question

1-64a square-12a+48a square

Answer 1

$(1 - 64a) {}^{2} - ( - 12a \: + 48a) {}^{2} \\ = (1 - 4096 {a}^{2} ) - (144 {a -}^{2} - 2304 {a}^{2} ) \\ = 4095 {a}^{2} - 2448 {a }^{2} \\ = 1647 {a}^{2}$